Spring RestTemplate timeout

Question

I would like to set the connection timeouts for a rest service used by my web application   I m using Spring s RestTemplate to talk to my service   I ve done some research and I ve found and used the xml below  in my application xml  which I believe is meant to set the timeout   I m using Spring 3 0   I ve also seen the same problem here Timeout configuration for spring webservices with RestTemplate but the solutions don t seem that clean  I d prefer to set the timeout values via Spring config   lt bean id  RestOperations  class  org springframework web client RestTemplate  gt       lt constructor-arg gt          lt bean class  org springframework http client CommonsClientHttpRequestFactory  gt           lt property name  readTimeout  value    restURL connectionTimeout     gt         lt  bean gt       lt  constructor-arg gt   lt  bean gt    It seems whatever I set the readTimeout to be I get the following   Network cable disconnected  Waits about 20 seconds and reports following exception   org springframework web client ResourceAccessExcep tion  I O error  No route to host  connect  nested exception is java net NoRouteToHostException  No route to host  connect  Url incorrect so 404 returned by rest service  Waits about 10 seconds and reports following exception   org springframework web client HttpClientErrorException  404 Not Found  My requirements require shorter timeouts so I need to be able to change these   Any ideas as to what I m doing wrong   Many thanks

User · Accepted Answer

I finally got this working   I think the fact that our project had two different versions of the commons-httpclient jar wasn t helping   Once I sorted that out I found you can do two things     In code you can put the following   HttpComponentsClientHttpRequestFactory rf        HttpComponentsClientHttpRequestFactory  restTemplate getRequestFactory    rf setReadTimeout 1   1000   rf setConnectTimeout 1   1000     The first time this code is called it will set the timeout for the HttpComponentsClientHttpRequestFactory class used by the RestTemplate  Therefore  all subsequent calls made by RestTemplate will use the timeout settings defined above   Or the better option is to do this    lt bean id  RestOperations  class  org springframework web client RestTemplate  gt       lt constructor-arg gt           lt bean class  org springframework http client HttpComponentsClientHttpRequestFactory  gt               lt property name  readTimeout  value    application urlReadTimeout     gt               lt property name  connectTimeout  value    application urlConnectionTimeout     gt           lt  bean gt       lt  constructor-arg gt   lt  bean gt    Where I use the RestOperations interface in my code and get the timeout values from a properties file

User · Answer

I had a similar scenario  but was also required to set a Proxy  The simplest way I could see to do this was to extend the SimpleClientHttpRequestFactory for the ease of setting the proxy  different proxies for non-prod vs prod   This should still work even if you don t require the proxy though  Then in my extended class I override the openConnection URL url  Proxy proxy  method  using the same as the source  but just setting the timeouts before returning    Override protected HttpURLConnection openConnection URL url  Proxy proxy  throws IOException       URLConnection urlConnection   proxy    null   url openConnection proxy    url openConnection        Assert isInstanceOf HttpURLConnection class  urlConnection       urlConnection setConnectTimeout 5000       urlConnection setReadTimeout 5000       return  HttpURLConnection  urlConnection

User · Answer

Here is a really simple way to set the timeout    RestTemplate restTemplate   new RestTemplate getClientHttpRequestFactory      private ClientHttpRequestFactory getClientHttpRequestFactory         int timeout   5000      HttpComponentsClientHttpRequestFactory clientHttpRequestFactory         new HttpComponentsClientHttpRequestFactory        clientHttpRequestFactory setConnectTimeout timeout       return clientHttpRequestFactory

User · Answer

This question is the first link for a Spring Boot search  therefore  would be great to put here the solution recommended in the official documentation  Spring Boot has its own convenience bean RestTemplateBuilder    Bean public RestTemplate restTemplate          RestTemplateBuilder restTemplateBuilder         return restTemplateBuilder              setConnectTimeout Duration ofSeconds 500                setReadTimeout Duration ofSeconds 500                build        Manual creation of RestTemplate instances is a potentially troublesome approach because other auto-configured beans are not being injected in manually created instances

User · Answer

Here are my 2 cents  Nothing new  but some explanations  improvements and newer code    By default  RestTemplate has infinite timeout  There are two kinds of timeouts  connection timeout and read time out  For instance  I could connect to the server but I could not read data  The application was hanging and you have no clue what s going on   I am going to use annotations  which these days are preferred over XML    Configuration public class AppConfig         Bean     public RestTemplate restTemplate              var factory   new SimpleClientHttpRequestFactory             factory setConnectTimeout 3000           factory setReadTimeout 3000            return new RestTemplate factory             Here we use SimpleClientHttpRequestFactory to set the connection and read time outs  It is then passed to the constructor of RestTemplate    Configuration public class AppConfig         Bean     public RestTemplate restTemplate RestTemplateBuilder builder             return builder                  setConnectTimeout Duration ofMillis 3000                    setReadTimeout Duration ofMillis 3000                    build              In the second solution  we use the RestTemplateBuilder  Also notice the parameters of the two methods  they take Duration  The overloaded methods that take directly milliseconds are now deprecated   Edit Tested with Spring Boot 2 1 0 and Java 11

User · Answer

For Spring Boot    1 4   Configuration public class AppConfig        Bean     public RestTemplate restTemplate RestTemplateBuilder restTemplateBuilder                 return restTemplateBuilder             setConnectTimeout                  setReadTimeout                  build                For Spring Boot  lt   1 3   Configuration public class AppConfig        Bean      ConfigurationProperties prefix    custom rest connection       public HttpComponentsClientHttpRequestFactory customHttpRequestFactory                  return new HttpComponentsClientHttpRequestFactory                Bean     public RestTemplate customRestTemplate                 return new RestTemplate customHttpRequestFactory               then in your application properties  custom rest connection connection-request-timeout     custom rest connection connect-timeout     custom rest connection read-timeout       This works because HttpComponentsClientHttpRequestFactory has public setters connectionRequestTimeout  connectTimeout  and readTimeout and  ConfigurationProperties sets them for you     For Spring 4 1 or Spring 5 without Spring Boot using  Configuration instead of XML   Configuration public class AppConfig        Bean     public RestTemplate customRestTemplate                 HttpComponentsClientHttpRequestFactory httpRequestFactory   new HttpComponentsClientHttpRequestFactory            httpRequestFactory setConnectionRequestTimeout               httpRequestFactory setConnectTimeout               httpRequestFactory setReadTimeout                return new RestTemplate httpRequestFactory

User · Answer

RestTemplate timeout with SimpleClientHttpRequestFactory To programmatically override the timeout properties  we can customize the SimpleClientHttpRequestFactory class as below    Override timeout with SimpleClientHttpRequestFactory    Create resttemplate RestTemplate restTemplate   new RestTemplate getClientHttpRequestFactory        Override timeouts in request factory private SimpleClientHttpRequestFactory getClientHttpRequestFactory          SimpleClientHttpRequestFactory clientHttpRequestFactory                         new SimpleClientHttpRequestFactory          Connect timeout     clientHttpRequestFactory setConnectTimeout 10 000          Read timeout     clientHttpRequestFactory setReadTimeout 10 000       return clientHttpRequestFactory       RestTemplate timeout with HttpComponentsClientHttpRequestFactory SimpleClientHttpRequestFactory helps in setting timeout but it is very limited in functionality and may not prove sufficient in realtime applications  In production code  we may want to use HttpComponentsClientHttpRequestFactory which support HTTP Client library along with resttemplate    HTTPClient provides other useful features such as connection pool  idle connection management etc   Read More   Spring RestTemplate   HttpClient configuration example  Override timeout with HttpComponentsClientHttpRequestFactory    Create resttemplate RestTemplate restTemplate   new RestTemplate getClientHttpRequestFactory        Override timeouts in request factory private SimpleClientHttpRequestFactory getClientHttpRequestFactory          HttpComponentsClientHttpRequestFactory clientHttpRequestFactory                         new HttpComponentsClientHttpRequestFactory          Connect timeout     clientHttpRequestFactory setConnectTimeout 10 000          Read timeout     clientHttpRequestFactory setReadTimeout 10 000       return clientHttpRequestFactory      reference  Spring RestTemplate timeout configuration example

User · Answer

To expand on benscabbia s answer   private RestTemplate restCaller   new RestTemplate getClientHttpRequestFactory      private ClientHttpRequestFactory getClientHttpRequestFactory         int connectionTimeout   5000     milliseconds     int socketTimeout   10000     milliseconds     RequestConfig config   RequestConfig custom          setConnectTimeout connectionTimeout         setConnectionRequestTimeout connectionTimeout         setSocketTimeout socketTimeout         build        CloseableHttpClient client   HttpClientBuilder        create          setDefaultRequestConfig config         build        return new HttpComponentsClientHttpRequestFactory client

[spring] Spring RestTemplate timeout

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